help: Exchange all indentations to spaces, remove trailing ws and generalize indentations (#3193)

* help: Exchange all indentations to spaces and remove trailing ws

* Add some missing `` marks

Co-authored-by: Jöran Karl <3951388+JoeKar@users.noreply.github.com>

* help: Generalize indentation levels

* help: Some small visual changes

- removed some superfluous whitespaces
- add a line break in before an link
- corrected one typo

---------

Co-authored-by: Yevhen Babiichuk (DustDFG) <dfgdust@gmail.com>

runtime/help/help.md

@@ -4,9 +4,9 @@ Micro is an easy to use, intuitive, text editor that takes advantage of the
 full capabilities of modern terminals.
 
 Micro can be controlled by commands entered on the command bar, or with
-keybindings. To open the command bar, press Ctrl-e: the `>` prompt will
+keybindings. To open the command bar, press `Ctrl-e`: the `>` prompt will
 display. From now on, when the documentation shows a command to run (such as
-`> help`), press Ctrl-e and type the command followed by enter.
+`> help`), press `Ctrl-e` and type the command followed by enter.
 
 For a list of the default keybindings, run `> help defaultkeys`.
 For more information on keybindings, see `> help keybindings`.
@@ -14,7 +14,7 @@ To toggle a short list of important keybindings, press Alt-g.
 
 ## Quick-start
 
-To quit, press Ctrl-q. Save by pressing Ctrl-s. Press Ctrl-e, as previously
+To quit, press `Ctrl-q`. Save by pressing `Ctrl-s`. Press `Ctrl-e`, as previously
 mentioned, to start typing commands. To see which commands are available, at the
 prompt, press tab, or view the help topic with `> help commands`.
 
@@ -26,31 +26,31 @@ If the colorscheme doesn't look good, you can change it with
 or see more information about colorschemes and syntax highlighting with `> help
 colors`.
 
-Press Ctrl-w to move between splits, and type `> vsplit filename` or
+Press `Ctrl-w` to move between splits, and type `> vsplit filename` or
 `> hsplit filename` to open a new split.
 
 ## Accessing more help
 
 Micro has a built-in help system which can be accessed with the `> help` command.
 
-To view help for the various available topics, press Ctrl-e to access command
+To view help for the various available topics, press `Ctrl-e` to access command
 mode and type in `> help` followed by a topic. Typing just `> help` will open
 this page.
 
 Here are the available help topics:
 
-* tutorial: A brief tutorial which gives an overview of all the other help
-  topics
-* keybindings: Gives a full list of the default keybindings as well as how to
-  rebind them
-* defaultkeys: Gives a more straight-forward list of the hotkey commands and
-  what they do
-* commands: Gives a list of all the commands and what they do
-* options: Gives a list of all the options you can customize
-* plugins: Explains how micro's plugin system works and how to create your own
-  plugins
-* colors: Explains micro's colorscheme and syntax highlighting engine and how
-  to create your own colorschemes or add new languages to the engine
+* `tutorial`: A brief tutorial which gives an overview of all the other help
+   topics
+* `keybindings`: Gives a full list of the default keybindings as well as how to
+   rebind them
+* `defaultkeys`: Gives a more straight-forward list of the hotkey commands and
+   what they do
+* `commands`: Gives a list of all the commands and what they do
+* `options`: Gives a list of all the options you can customize
+* `plugins`: Explains how micro's plugin system works and how to create your own
+   plugins
+* `colors`: Explains micro's colorscheme and syntax highlighting engine and how
+   to create your own colorschemes or add new languages to the engine
 
 For example, to open the help page on plugins you would run `> help plugins`.